Metal Building Insulation Calculator

Built for existing metal building retrofit and cover-over installs. Enter your building dimensions, pick your product and framing spacing, add any doors, and get a complete material list - insulation rolls, seam tape, screws, and hardware - with live cart totals and one-click add to cart.

Start My Estimate Prefer a Free Quote?

Not sure which product to choose? Compare the 2mm Pro and 6mm Supreme before running the numbers. Questions about framing spacing? Call us at 800-595-8772 before ordering.

What a Cover System Install Looks Like

The BlueTex™ TermBar Cover System installs directly over existing failing insulation - no demo, no chemicals, no contractor license required. Drag the handles below to compare before and after on real installs.

What This Calculator Covers

This tool is designed for standard gable-roof metal buildings - agricultural shops, warehouses, barns, and commercial steel buildings with purlins at 48" on center. It handles both new installs on a bare steel frame and cover/retrofit installs using the BlueTex™ TermBar Cover System.

Select the areas you want to insulate - roof only, walls only, or the full building - and the calculator will break out the material list by component. If you are doing a retrofit install over existing failing insulation, select the Cover System option and TermBar pack counts will be added to your list automatically.

Why Framing Spacing Is the Most Important Input

BlueTex rolls are sized to fit specific framing intervals - 50" wide for 48" on-center framing, 62" wide for 60" on-center framing. Ordering the wrong width means the material will not span your purlins correctly and cannot be returned without significant freight cost. If you are unsure of your framing spacing, measure the distance between purlin centerlines before ordering, or call us at 800-595-8772 before placing an order.

How the Roll Yield Works

Each roll is rated by total square footage, but the effective coverage per roll is lower because of the 2" overlap required at every seam. The calculator uses the actual effective yield - not the nominal roll size - so your roll count will not come up short on the job. The waste allowance (adjustable from 5% to 10%) is added on top of that to account for cuts around doors, windows, and corners.

Roll-Up Doors vs. Insulated Panel Doors

Roll-up doors get insulated with a cut piece of BlueTex laid over the door panel and held in place with double-sided tape - so the door area is included in your roll count and double-sided tape rolls are added to the list automatically. Insulated panel doors are deducted from the total wall area so you do not over-order material for openings that are already covered.

Completed Installs

Every one of these was done over existing insulation - no tearout, no demo.

Related Products

• BlueTex™ 2mm Pro - 50" wide, for 48" framing
• BlueTex™ 2mm Pro - 62" wide, for 60" framing
• BlueTex™ 6mm Supreme - 50" wide, for 48" framing
• BlueTex™ 6mm Supreme - 62" wide, for 60" framing
• 3" White Vapor Barrier Seam Tape
• Screw and Washer Sets - 100-piece and 500-piece
• EasyClip™ Fasteners - for red iron and Z-purlin buildings
• Cover/Repair System Sample Box
• Request a free quote - complete material list with freight to your door